Basic authentication options are incompatible with request lib

[marcboscher]

In the original request lib, to use basic authentication you set auth.user and auth.pass in options

request.get('http://some.server.com/', {
  'auth': {
    'user': 'username',
    'pass': 'password',
    'sendImmediately': false
  }
});

Ref: https://www.npmjs.com/package/request#http-authentication

But browser-request expectsauth.username and auth.password. See

browser-request/index.js

Line 160 in 5966b45

options.headers.authorization = 'Basic ' + b64_enc(options.auth.username + ':' + options.auth.password);

This breaks compatibility between the two libs.